#include<iostream>
#include<string>
using std::string;
void test1() {
	int a = 1, b = 2;
	&a;  
	&b;
	&(a + b);
	&10;
	&string("hello");
    
    //非const引用尝试绑定
	int & r1 = a;
	int & r2 = 1;
    
    //const引用尝试绑定
	const int & r3 = 1;
	const int & r4 = a;
    
	string s1("hello");
	string s2("wangdao");
	&s1;
	&s2;
	&(s1 + s2);

}
